Physical sciences, Earth sciences

We have reached planetary boundaries - human pressures on finite, earth systems are at a tipping point. However, the technology to address this near catastrophe is now within our reach, according to expert in sustainable development, Jeffrey Sachs.

Rice, maize, soybeans and wheat are the main source of nutrients for over 2 billion people living in poor countries. But with climate change and the rising amount of CO2 in the air we breathe, their already low nutrient value compared to meat, for instance, is set to decrease.