Headlines 3:

Carbon dioxide levels in the atmosphere hit another new record

CO2空氣濃度：the concentration of co2 in the atmosphere/ atmospheric co2 concentration

Scientists have been measuring the concentration of co2 in the atmosphere since 1954.

數(shù)據(jù)現(xiàn)狀描述：Every May since 1964, the concentrations of planet-warming gas have reached new heights. This year the monthly average concentration of atmospheric co2 peaked at 420 ppm.

Ppm: parts per million

溫室氣體：greenhouse gas/ planet-warming gas: trap heat in the atmosphere and warm the planet

數(shù)據(jù)變化對比：Levels of greenhouse gas are now 30% higher than when measurements began 64 years ago and 50% higher than pre-industrial times/age.

To limit warming in around 1.5~ above pre-industrial levels, gas emissions would have to peak in 2025 and be reduced to net-zero by 2050, halting the rise in atmospheric co2.

Net-zero means achieving a balance between the carbon emitted into the atmosphere and the carbon removed from it. Another term is carbon neutral, which is a policy of not increasing carbon emissions and achieving carbon reductions through offsets. 節(jié)能減排