Such shifts are just some of the changes already happening as a result of increasing levels of greenhouse gases in the atmosphere, otherwise known as climate change. (scientificamerican.com)
Our current level of greenhouse gas emissions increase means that temperature rise of at least 3.5 °C are likely. (treehugger.com)
But global warming, triggered by rising levels of greenhouse gases in the atmosphere, has changed all that. (climatenewsnetwork.net)