Deforestation and - even more compelling - climate change laid waste to Mayan agriculture, forcing Tikal's abandonment 11 centuries ago.
But he said the event, while exceptional, should be viewed alongside other compelling evidence of climate change, including on the ground in Greenland.
Obama has consistently made a compelling case for climate action based on the science and has fought in Congress and internationally for robust policies to cut emissions and promote clean energy.
Public officials, policy experts, investors, industry executives, students and eager citizens will gather to listen to and discuss America's most pressing and compelling energy and climate issues with panels of experts and innovators, teed up by President Obama himself.
Thus, our study adds to the knowledge about the population dynamics of Arctic herbivores by providing a compelling demonstration that climate impacts can be integrated and expressed similarly in species with highly contrasting life histories.
One of the most compelling arguments against climate-change regulation is not that global warming isn't occurring but, rather, that the dangers of further regulation far outweigh its likely benefits.
However, there is a vacuum where a compelling conservative narrative on climate change should be – something which the report, entitled A new conversation with the centre-right about climate change, takes the first steps towards addressing.
The most compelling evidence that ongoing climate change processes will impact species distributions results is provided by the response of organisms to past climate change [1].
There are many compelling reasons for fighting climate change Ñ the threats to mangroves in the Pacific É underline yet another reason to act".
Jon Creyts, a McKinsey partner in Chicago, said that energy efficiency presented the "most compelling" way to combat climate change, as well as to achieve energy security and affordability.
