Resource depletion is a serious threat, likely to affect us before the worst impacts of global warming arrive, writes Emeritus Professor Ron Lang.

Unless biofuels are able to compete with electricity there is no economic reason for their production for transport, argues Mike Pope.

In order to survive the uncertain times ahead, Australia should look to the people, plants and animals that live in the harshest and most unpredictable habitat - the desert.

If negotiators at the United Nations climate change meeting in Copenhagen want to be effective, they must address agricultural and land use practices, writes Gerald Nelson.

Kenyan MP and remote sensing expert, Wilbur Ottichilo, argues the time is ripe for using satellites to spot developing African droughts.

Research has shown that climate change is going to make it a lot harder for the world to grow food, but Australia is in a good position to meet the challenge, according to Enzo Allara.

Innovative agricultural technologies can produce crops that meet climate change challenges, says William Dar, head of the International Crops Research Institute for the Semi-Arid Tropics.

Selling the climate negotiations to the world’s farmers must be overcome by focusing on how we measure greenhouse gas emissions, according to Dr Don McClatchy.

Simply reducing livestock farming in developing countries will neither cut emissions nor benefit the poor, says livestock expert Carlos Seré.

Practicalities of trading carbon and protecting forests make meeting high expectations for REDD hard, say Esteve Corbera and Manuel Estrada.