This misrepresents Thunberg a bit.

1) She's 18.

2) Her youth, is related to why she speaks out, being that generation that is most effected (so far) by climate change, but that does not yet have democratic rights.

3) She writes her own speeches. To an international audience, she writes them in English.

It also misrepresents Dr Curry a bit.

1) She was a scientist. She retired from academia five years ago.

2) She has publish one scientific book. Two if you include co-authoring. She's published something of that order of scholarly papers. The person who made that image doesn't understand what a book is?

3) She doesn't say it's all a hoax. She said in her congress testimony that "Manmade climate change is a theory in which the basic mechanism is well understood, but the potential magnitude is highly uncertain. Scientists agree that surface temperatures have increased overall since 1880, humans are adding carbon dioxide to the atmosphere, and carbon dioxide and other greenhouse gases have a warming effect on the planet."

(For what it's worth, most people would be more cautious where the uncertainties are high, but she advocates against "overreaction". But she certainly does not claim that there's any sort of hoax.)