Canadian scientists are hoping to replace a third of jetfuel with biofuel made using seeds from an Ethiopian plant within the next decade. But legislation and the need for further testing is causing some delays.
Though air travel is more popular than ever, the vast majority of people in the world have never been on a plane. As that dynamic slowly changes, the environment stands to suffer. Is flying less the only solution?
Could transforming rubbish management play a role in meeting Rio de Janeiro's carbon net-zero goal? The city is exploring a new way of processing food waste, with a project that's the first of its kind in Latin America.
French lawmakers have voted to remove tax breaks for the use of palm oil as a biofuel. The tax incentive would have benefited energy giant Total, but it led to howls of protest from environmentalists.
Vehicle restrictions have been introduced in and around the Indian capital, New Delhi, as part of an effort to cut soaring levels of air pollution. Private cars will be allowed on the roads on alternate days.
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