Changes in the Earth's atmosphere and climate have already played their parts in waking governments up to the threat global warming has on our society. The real challenge now however, is to make sure countries stand by their promises to mitigate further flare ups triggered by climate change.
COP21 was one of the latest charges against global warming, with 195 nations adopting a universal agreement last December, which is expected to see countries take action on limiting the rise in the Earth's temperature to "well below" 2 degrees Celsius during this century.
"There were an extraordinary number of agreements that were reached in 2015 around the future of development, how we see society and the planet, and how we will combat climate change," Rachel Kyte, CEO of the Sustainable Energy for All (SE4All) initiative, told CNBC's Sustainable Energy.
"We have to now get things done and that requires extraordinary partnership of government, the private sector and civil society."