Carbon dioxide levels<span> in the </span>atmosphere<span> by 2050 are predicted to be about double what they were before the. Industrial Revolution. ... 1% or 2% per </span>decade<span>, consistent with a warming </span>atmosphere<span>. .... Species are not yet responding to climate change because average temperatures </span>have<span> only </span>increasedabout 0.8°C<span> globally
