Ten technologies to save the climate

Could you name 10? I'm not sure I could have, but never fear, New Scientist to the rescue. Here are three that I reckon it'd be easy to miss from your list.

7. Second-generation biofuels
Making fuel from food crops is now almost universally regarded as a bad idea, encouraging deforestation and potentially leading to food shortages. But the next generation of biofuels made from agricultural waste shows real promise. Using new cellulose-cracking technologies, waste wood can be broken down into liquid fuel, and with US venture capitalists investing heavily in these technologies, it won't be long until this idea becomes a reality. However, with the global appetite for fuel on the increase, careful management of cellulose production will be vital.
8. Carbon capture
With the growth of renewable energy sources failing to keep up with world demand for electricity, finding an effective way of capturing and storing the carbon dioxide produced by power stations is one of the most important challenges we face. Investment in carbon-capture technologies has been slow to pick up, but governments around the world are starting to understand the importance of funding this research, and promising new technologies are already emerging.
9. Biochar
With predictions of climate change getting increasingly urgent, we desperately need cheap, simple and fast ways of reducing greenhouse emissions. One idea is to sequester carbon as biochar, a charcoal made from burning agricultural waste in the absence of air. Biochar is exceptionally stable and can be stored underground for hundreds of years without releasing its carbon into the atmosphere - and it improves the fertility of the soil.
10. Biogas stoves
Deforestation is a complex issue, and it's looking more and more likely that we will have to pay people to maintain forest lands. But until such a system is up and running, we will need to focus on technologies that reduce the need to cut down trees. One such technology is biogas stoves, powered by methane released from rotting organic waste, which would otherwise be released into the atmosphere. Leading the way is China, which is heavily promoting the use of biogas technologies.