The report earlier this week from the IPCC provides yet
another reminder of the threats in the not too distant future from the effects
of global warming. I have been following this story closely since my interest
was alerted in the mid 1980s so for me, and I am sure many others, it is an
issue close to my heart.
The Special Report on Global Warming of 1.5ºC was
approved by the IPCC on Saturday in Incheon, Republic of Korea. It will be a
key scientific input into the Katowice Climate Change Conference in Poland in
December, when governments review the Paris Agreement to tackle climate change.
"With more than 6,000 scientific references
cited and the dedicated contribution of thousands of expert and government
reviewers worldwide, this important report testifies to the breadth and policy
relevance of the IPCC," said Hoesung Lee, Chair of the IPCC.
The report is a follow-up to the Paris Agreement
of 2015 where the global community agreed on action to limit global warming to
a maximum of 2 ºC. This latest report calls for a lower target of 1.5 ºC.
The report says that limiting warming to the lower
target will require an industrial transition unprecedented in scale - but that
it is possible, if the political will is there - and that the wider
opportunities and benefits are huge. It will require large-scale changes from
out governments as well as individuals. We will need to invest around $2.4trillion
each year - around 2.5% of global GDP for at least the coming two decades.
The report is asking for the global community to
agree on 5 major steps:
- A reduction in CO2 levels by 45% by 2030
- Renewables to provide 85% of global electricity by
2050
- Coal to be phased out completely
- An area the size of Australia for energy crops
- Global net zero emissions by 2050
Basically the report suggests if we fail to
achieve these targets we are screwed.
Consequences
Since the mid 1800s the world has warmed by around
1 ºC
and unless there are some drastic changes, we are heading for 1.5 ºC increase
by 2050. This may not sound like much but at the end of the last ice age, the
UK was covered in around 2,000 ft of glacier and the average temperature was
only 6 to 8 degrees cooler than today.
Global climate change has already
had observable effects on the environment. Glaciers have shrunk, ice on rivers
and lakes is breaking up earlier, plant and animal ranges have shifted and
trees are flowering sooner.
Effects that scientists had
predicted in the past would result from global climate change are now
occurring: loss of sea ice, accelerated sea level rise and longer, more intense
heat waves.
Global warming = more extreme
weather...droughts, storms, hurricanes, wildfires. Glaciers and polar ice caps
will continue to melt which results in a rise in global sea levels which will
be a threat to islands and coastal communities.
Severe droughts and/or flooding
over large areas will result in a mass migration of people in affected areas which
will increase political and economic stability.
In short, global warming and
climate change could have far-reaching and long-lasting consequences for
millions, possibly billions of people depending on the degree and speed of
warming.
What Can We Do?
Of course we have known about the probable effects
of climate change for at least 30 years. The IPCC was set up in 1988 by the UN and the World Meteorological
Organisation, bringing together the world’s leading climate scientists to
assess knowledge of climate change and provide scientific advice to
policymakers.
In 2006 the UK
government published the Stern Report on Climate Change, led by the former World Bank chief
economist Sir Nicholas Stern, showing for the first time that the catastrophic
economic impacts of climate change far outstrip the relatively modest costs of
reducing emissions.
I first became aware of the problem in the mid
1980s having read 'Seeing Green' by Jonathan Porritt who was then director of Friends of the Earth. I have tried to do my bit
over the years and reduce my carbon footprint. Nothing dramatic but changes to
lifestyle...basic insulation around the house, cut back on meat, avoid flights/cruises abroad
and take holidays in the UK (that's why I do not need a passport), an extra layer of clothing rather than turn up the
heating and planting a tree or two. During my stay in Devon we held an annual tree
week event and over a period of 6 years collectively planted around 10,000
trees on Dartmoor in conjunction with the Moor Trees Charity.
We probably do not have much influence on what our government does or does not do, on the phasing out of fossil fuel power
stations and the introduction of all the infrastructure to support the switch
to electric transport. President Trump may pull out of the Paris Climate
Agreement and there's not much we can do to change his mind. However, we can
all choose what we eat, how we move around, where we take holidays and weekend
breaks and generally how we live our lives. It's easy to think what one person
chooses to do or not do will not make any difference but the way we act will
influence the people around us and will have a knock-on effect. Small lifestyle
changes taken by millions of individuals will have a significant impact on the
big picture.
Avoiding meat and dairy products is the single biggest way to
reduce your environmental impact on the planet, according to the scientists
behind the most comprehensive analysis to date of the damage farming does to
the planet.
For starters, a cow on average release between
70 and 120 kg of methane each year. Methane is a greenhouse gas like carbon
dioxide (CO2). But the negative effect on the climate of methane is 23 times
higher than the effect of CO2. Therefore the release of about 100 kg methane
per year for each cow is equivalent to about 2,300 kg CO2 per year.
Secondly land use - without meat and dairy consumption, global
farmland use could be reduced by more than 75% – an area equivalent to the US,
China, European Union and Australia combined – and still feed the world. For example, beef cattle raised on deforested land
result in 12 times more greenhouse gases and use 50 times more land than those
grazing rich natural pasture.
Another area of concern highlighted in the
report is aviation which is growing at a rapid pace due to 'cheap' flights. It
currently accounts for up to 5% of all global warming emissions. Air travel has
a much greater impact per passenger mile travelled compared to road or rail.
Studies show that high altitude emissions which also include water vapour as
well as CO2, nitrous oxides and sooty particulates from the burning of
kerosene. Aviation is the fastest growing area of all contributors to global
warming. Most air travellers are blissfully unaware of how their flying
behaviour contributes to global warming.
Aviation, along with shipping, was given
special status and excluded from the Kyoto and Paris climate change agreements. Also,
under the Chicago Convention, countries are not permitted to levy fuel duties
or VAT on international flights. Not that our political parties are looking to
restrict cheap flights!
Hopefully our governments will take these
issues more seriously but judging by the progress of the Green Party over
recent years I am not holding my breath.
In the absence of governments and business
grasping the nettle, it will fall to individuals to instigate some changes.
So, a few suggestions:
- think about reducing consumption of meat or going
veggie
- look into the option of electric cars or even car
share
- walk or cycle short distances (2 miles or less)
- think about food miles and choose local produce
- think about second-hand clothes from charity shops
rather than new
- think about UK holidays to avoid air travel/cruises
- put on an extra layer of clothing rather than turn
up heating
- look out for opportunities to plant a tree in your
community
- support an environmental organisation
People talk about saving the planet...to be
honest, the planet really doesn't care whether we 'save' it or not because it will
carry on regardless. What matters is whether we can continue with a relatively
benign environment much as we have become used to over the past 10,000 years,
or whether we stubbornly stick out collective heads in the sand and create a
very hostile planet for out children and grandchildren.
Mahatma Gandhi famously said, "You must be the change
you want to see in the world." In other words, although life changes are inevitable, we can
also initiate personal change so we can rise to the challenges that we all face. It is
empowering and means we take some responsibility for the changes we want to see
happen without relying on other people to make the changes. It's about bringing
your beliefs and lifestyle into closer alignment.
Our politicians spend much of their time sqabbling over Brexit but our climate scientists remind us all that the existential threat of the hour is global warming. The window to make the changes required becomes
smaller with each passing year.
Further Research
Are you worried by climate change? What do you
think our government needs to do now? What changes have you made (or intend to
make) in your personal lifestyle to reduce your carbon footprint? Maybe you
think the scientists have got it wrong and it's all unnecessary scaremongering?
Leave a comment below.
