Three Years

In a comment published in Nature, Christiana Figueres et al announce the launch of Mission 2020 and explain the need to start reducing carbon dioxide emissions before it's too late.

The technology-driven transition to low-carbon energy is well under way, a trend that made the 2015 Paris climate agreement possible. But there is still a long way to go to decarbonize the world economy.

When it comes to climate, timing is everything. According to an April report, should emissions continue to rise beyond 2020, or even remain level, the temperature goals set in Paris become almost unattainable.