I worry for our world.

We have the ability and knowledge to shape a better future for the world.

I worry we are not doing it.

"This report is not a wake-up call, it is a ticking timebomb," said Gro Harlem Brundtland, Acting Chair of The Elders in a statement. "Climate activists have been calling for decades for leaders to show responsibility and take urgent action, but we have barely scratched the surface of what needs to be done. Further failure would be an unconscionable betrayal of the planet and future generations."

And this:

"It's the final call, say scientists, the most extensive warning yet on the risks of rising global temperatures." 

What can I do?
The report says there must be rapid and significant changes in four big global systems:

• energy • land use • cities • industry

But it adds that the world cannot meet its target without changes by individuals, urging people to:

• buy less meat, milk, cheese and butter and more locally sourced seasonal food - and throw less of it away • drive electric cars but walk or cycle short distances • take trains and buses instead of planes • use videoconferencing instead of business travel • use a washing line instead of a tumble dryer • insulate homes • demand low carbon in every consumer product 

Lifestyle changes can make a big difference, said Dr Debra Roberts, the IPCC's other co-chair.

"That's a very empowering message for the individual," she said. "This is not about remote science; it is about where we live and work, and it gives us a cue on how we might be able to contribute to that massive change, because everyone is going to have to be involved."

"You might say you don't have control over land use, but you do have control over what you eat and that determines land use.

"We can choose the way we move in cities and if we don't have access to public transport - make sure you are electing politicians who provide options around public transport."