Whenever there is bad news about climate change, people ask: What can be done?
That’s likely to be the case again following Tuesday’s news that 2023 shattered annual heat records.
The European climate agency Copernicus said average global temperatures were 1.48º Celsius (2.66º Fahrenheit) hotter than pre-industrial times. That’s barely within the 1.5ºC international goal countries agreed to in the 2015 Paris climate accord to avoid a world devastated by climate change.
And January 2024 is on track to be so warm that for the first time, a 12-month period will exceed the 1.5º threshold, Copernicus Deputy Director Samantha Burgess said.
Scientists have repeatedly said that Earth would need to average 1.5 degrees of warming over two or three decades to be a technical breach of the threshold.
Scientists and energy experts have long laid out roadmaps – solutions – to reduce greenhouse gases like carbon dioxide and methane that are heating up the planet. And there’s hope for the way forward, the International Energy Agency said in its World Energy Outlook for 2023.
Led by solar and electric vehicles, investment in clean energy has risen by 40 per cent since 2020. Proponents of nuclear power say ramping up that carbon-free source can replace fossil fuels now as a way of making electricity.
Sharp cuts in methane emissions have become a global priority, as shown by the discussions at the United Nations COP28 climate talks in Dubai last month. Each person can also reduce their impact on the environment through the choices they make, whether that’s saving energy at home, switching to an electric vehicle, reducing air travel, or eating less meat and more plant-based foods.
Below is a closer look at all of these solutions.
Nearly 200 countries agreed last month at COP28 to move away from fossil fuels by tripling the use of renewable energy by 2030. It was the first time they’ve made that crucial pledge to transition, but it will require new installations at double the current rate.
UN chief António Guterres said a fossil fuel phaseout is “inevitable”. Scientists overwhelmingly agree the world needs to drastically cut the burning of coal, oil and gas to limit global warming. That’s because when fossil fuels are burned, carbon dioxide forms and is released.
As an example, a 200-megawatt onshore wind project consisting of roughly 50 turbines, on average, avoids the emissions equivalent of taking 100,000 cars off the road or planting 20 million trees, according to the American Clean Power Association. The United States, which has lagged far behind Europe and Asia in building large offshore wind farms, now has two sending power to the grid that could fully open early this year.
To control global warming, the IEA says global nuclear capacity needs to expand by about three per cent each year. The global nuclear industry launched an initiative at COP28 for nations to pledge to triple nuclear energy by 2050. More than 20 have already signed on, including the United States and the host of the talks, the United Arab Emirates.
The World Nuclear Association says this form of electricity can be deployed on a large scale in time to combat climate change by directly replacing fossil fuel plants. Unlike fossil fuel-fired power plants, nuclear reactors do not produce carbon dioxide while operating.
US nuclear companies are also working on the next generation of reactors that are far smaller and cheaper than traditional ones. These small modular reactors and microreactors in the future could power a community, campus or military complex. Sceptics, however, caution that nuclear technology still comes with significant safety, security and environmental risks that other low-carbon energy sources don’t.
Methane, or natural gas, is an extraordinarily powerful greenhouse gas, more potent at trapping heat than carbon dioxide. It’s responsible for about 30 per cent of today’s global warming.
Many nations are prioritising bringing down methane emissions as a crucial, quick way to curb further warming, because it doesn’t last as long as carbon dioxide in the atmosphere absorbing the sun’s heat.
The Biden administration last month issued a final rule aimed at reducing methane emissions, targeting the United States’ oil and natural gas industry for its role.
Separately, 50 oil companies representing nearly half of global production pledged at COP28 to reach near-zero methane emissions and stop wasting natural gas by burning it off, by 2030. Environmental groups, however, called the pledge a “smokescreen to hide the reality that we need to phase out oil, gas and coal”.
Every individual can make choices that protect the environment and slow climate change, according to the United Nations’ Sustainable Development Goals.
The UN says start saving energy wherever possible – reduce heating and cooling, switch to LED light bulbs and energy-efficient electric appliances, wash laundry in cold water and hang things to dry. Improving a home’s energy efficiency through better insulation, or replacing an oil or gas furnace with an electric heat pump, can reduce the equivalent of up to 900 kilogrammes of CO2, or carbon dioxide, per year.
Switching from a gasolene- or diesel-powered car to an electric vehicle, taking fewer flights, and shifting from a diet reliant on meat to a vegetarian one can also make significant dents in one’s carbon footprint, the UN said. Producing plant-based foods generally results in fewer greenhouse gas emissions and requires less energy, land and water.
The record heat in 2023 made life miserable and sometimes deadly in Europe, North America, China and many other places last year. But scientists say a warming climate is also to blame for more extreme weather events, like the lengthy drought that devastated the Horn of Africa, the torrential downpours that wiped out dams and killed thousands in Libya, and the Canada wildfires that fouled the air from North America to Europe.
Antarctic sea ice hit record low levels in 2023 and broke eight monthly records for low sea ice, Copernicus reported.
Copernicus calculated that the global average temperature for 2023 was about one-sixth of a degree Celsius (0.3ºF) warmer than the old record set in 2016. While that seems a small amount in global record-keeping, it’s an exceptionally large margin for the new record, Burgess said. Earth’s average temperature for 2023 was 14.98ºC (58.96ºF), Copernicus calculated.
“It was record-breaking for seven months. We had the warmest June, July, August, September, October, November, December,” Burgess said. “It wasn’t just a season or a month that was exceptional. It was exceptional for over half the year.”