What's happening?

"It's now or never." That is what scientists say about climate change.

Experts who work for the United Nations have written a plan. It says that we can stop the worst of climate change. But to do it, we have to act right now.

The scientists come from all over the world. They have made lots of suggestions for countries to follow.

Here are four of their biggest tips:

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1. Energy. Scientists want human carbon usage to reach something called "net-zero" by 2050. Net zero is the point at which a country is taking as much of these climate-changing gases out of the atmosphere as it is putting in. This means using renewable energy like wind power.

2. Food. The scientists say what we eat has a big impactImpact implies changes in people's lives, such as changes in knowledge, skill, behaviour, health or living conditions. Impact can also be the action of one object hitting another, or the force with which one object hits another. . It will help the planet to eat less meat. It will also help to buy food from nearby. This will mean there are not so many ships and planes travelling with food from around the world.

3. Lifestyle. Experts say lifestyles will also need to change. This will mean governments doing more to encourage people to walk and cycle for transport.

4. Going electric. If we do keep using cars, they should be electric. These do not cause pollutionWhen harmful or dangerous things are put into the environment. . If they run on green electricity, they are much better for the planet.

Yes! We should not be so gloomy about the climate. If we work together, we can stop climate change from ruining our planet.

No. The scientists say we will only succeed if everyone follows the rules. Sadly, not enough people can or will try hard.