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“I don’t think there’s any question” that climate change is already affecting wheat production in North Dakota, says Roger Johnson, a former durum farmer who was the state’s agriculture commissioner from 1996 to 2009.

The televised horrors of Hurricane Sandy may help break the climate silence that still afflicts many Americans. “Mother Nature is better at bringing people to Jesus than any politician is,” notes Jay Fuhrer, the extension agent. But a fear of offending friends and neighbors still inhibits many. “The first thing we always talk about here is the weather, because it affects our lives so much,” says Donny Nelson. “But global warming, people just don’t get into it.”

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'Planetary boundaries' is an idea that was showcased by Johan Rockström, executive director of the Stockholm Resilience Centre, in Nature in 2009, and refers to limits to the use of nine of the Earth's resources, ranging from activities that generate carbon dioxide to land use, the loading of atmosphere with aerosols and the use of oceans.

Turok pointed out that the mechanisms proposed for achieving the green economy — including markets and pricing, government subsidies and regulation, government investment, capacity building, and stakeholder partnerships and collaboration — contradicted each other.

"If African countries don't [value and deploy their natural resources] they will have more foreigners grabbing their assets."

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What is a sip of clean water worth? Is there economic value in the shade of a tree? And how much would you pay for a breath of fresh air?

That study, started in 2007, has estimated the world economy suffers roughly $2.5 trillion to $4 trillion in losses every year due to environmental degradation. That's up to 7 percent of global GDP.

The message conveyed was that "... as policymakers, there's no longer any need to make policies, all you need to do is let technology sort your problems for you", Mooney told the General Assembly's Interactive Dialogue on Harmony with Nature earlier this month (18 April).

A United Nations Development Program Report of 2008 states that 83% of people who die due to impacts brought about by climate change disasters are women. Women and men are affected in different ways because of the different socio-cultural structure of their roles.

The 2009 State of Uganda Population Report focusing on 'addressing the effects of climate change on migration patterns and women' recognized that women in developing countries like Uganda produce 60% to 80% of food, and are also responsible for collecting firewood and water. This links women primarily to natural resources and if these resources like water are affected due to climate change then women are most likely to suffer. The Report states that 70% of the world's poor are women with most of them becoming the victims of climate change impacts.