The cement industry produces about 7% of global CO2 emissions, so it's developing these solutions.
People Fixing the World
An alarm that connects neighbours is helping to stop fires spreading.
Specially adapted trucks in Germany are being tested on electric roads.
One man in Bangladesh is trying to improve workers' lives by opening a shop with a twist.
Kenya's motorbike ambulances are saving the lives and limbs of people bitten by snakes
Seida Guadu performs an emergency Caesarean to try to save the lives of a baby and his mother.
Scientists hope a new test will help millions of people in Bangladesh avoid arsenic in their water.
Doctors in Italy say that sleep deprivation therapy can help some patients with bipolar disorder.
In Bangladesh specialist scooter taxis are helping women to get around the capital safely.
A community group in California is helping poor people get justice.