We can't take climate change and put it on the back burner. If we don't address climate change, we won't be around as humans.
There can be no more burying our heads in the sand by being afraid to even mention the words 'climate change' aloud.
Americans know our only response in the face of mounting risks from climate change must be the swift transition to a clean energy economy. We do not have the luxury of burying our heads in the sand.
After spending three or four years interacting with the Bush administration, I realized they were not taking any actions to deal with climate change. So, I decided to give one talk, and then it snowballed into another talk and eventually to even protesting and getting arrested.
By the time we see that climate change is really bad, your ability to fix it is extremely limited... The carbon gets up there, but the heating effect is delayed. And then the effect of that heat on the species and ecosystem is delayed. That means that even when you turn virtuous, things are actually going to get worse for quite a while.
We really need to kick the carbon habit and stop making our energy from burning things. Climate change is also really important. You can wreck one rainforest then move, drain one area of resources and move onto another, but climate change is global.
We seriously have to question the motivation of those people referred to as climate change sceptics, who are denying the evidence of human-caused climate change and preventing us from moving forward by spreading disinformation and supporting unchecked carbon pollution.
Climate change is not just about carbon dioxide levels and melting polar ice caps. It is about our public health and protecting our Earth for future generations.
Doing all we can to combat climate change comes with numerous benefits, from reducing pollution and associated health care costs to strengthening and diversifying the economy by shifting to renewable energy, among other measures.
Maybe climate change is a threat, and maybe climate change has been tarted up by climatologists trolling for research grant cash. It doesn't matter.
Ever since the collapse of cap and trade legislation and the realization that President Obama is unlikely to ever utter the words 'climate change' in public again, much less use the bully pulpit to prepare the nation for the catastrophic risks of inaction, the movement has been in a funk.
Climate change is happening, humans are causing it, and I think this is perhaps the most serious environmental issue facing us.
Climate change is the greatest threat to humanity, perhaps ever. Global temperatures are rising at an unprecedented rate, causing drought and forest fires and impacting human health.
I have to say that if our global alliances are going to be alliances with Hezbollah and Hamas and Hugo Chavez's Venezuela and Vladimir Putin's Russia, there is absolutely no chance of building a world-wide alliance that can deal with poverty and inequality and climate change and financial instability, and we've got to face up to that fact.
People are going to buy cheap fertilizer so they can grow enough crops to feed themselves, which will be increasingly difficult with climate change.
Our economic system, run for profit and waste and based primarily on the extractive industries, is the cause of climate change. We have wasted the earth's treasure and we can no longer exploit it cheaply.
China and India will take the global leadership on climate change: they are suffering for it.
We have great international experts within India telling us that the climate is changing, and actions has to be taken, otherwise China and India would be the countries most to suffer from climate change.
Climate change is analogous to Lincoln and slavery or Churchill and Nazism: it's not the kind of thing where you can compromise.
By 2007, 85% of Americans cited climate change as an important issue, compared with just 33% in prior years. The phrase we invented, 'An Inconvenient Truth,' became a part of the lexicon.
