Greta Thunberg: Your messages for the climate activist

Greta Thunberg is coming to the end of her long boat journey to the US.

She's due to arrive in the next couple of days, and you've been sending in your messages for the environmental campaigner.

She will be attending two big climate change conferences in the US and decided to sail there.

Greta Thunberg refuses to travel by aeroplane, because of the impact air travel has on the environment.

She'd previously said that she'd wanted to go to the conferences in America, but couldn't find a way to get there that wasn't by plane or cruise ship, which are high polluters.