EnvironmentThe population debate: Are there too many people on the planet? The world population is 7.7 billion. What do our growing numbers mean for economic security, climate change, environmental destruction and the likelihood of pandemics? Features
EnvironmentSuperwhite paint can cool buildings even in hot sunlight A new superwhite paint is so reflective that it can cool a surface to below the surrounding air temperature, even under sunlight. It could help reduce the use of energy-intensive air conditioning in hot countries ¿ìè¶ÌÊÓÆµ