Global temperatures are rising due to the accumulation of greenhouse gases in the atmosphere. In addition to increasing greenhouse gas emissions, human activity has changed the composition of particles in the atmosphere. These have masked some of the warming caused by the greenhouse gases. How large is this cooling effect, and how has it changed over time?
Aviation accounts for 3.5% of the human-made climate impact. Two-thirds of this impact are caused by emissions other than CO2, a new study shows.
Although large emissions cuts are urgently needed if we are to achieve the global climate goals, it may take decades before we can measure the effect of the reductions on global temperature evolution, a new study shows.
Daily global fossil CO2 emissions fell by 17% in early April 2020 compared to 2019 amid coronavirus lockdowns in most countries, with full-year 2020 emissions set to decrease by up to 7% depending on future social distancing.