It is real and when the oceans rise, Guyana will suffer immensely due to flooding.

Right here in the US, it seems to be a daily thing in the Miswest

Growing up by the Corentyne River in the 50s and 60s, I see the difference of the water levels then and now.

Climate change exists for ages with imperceptible adjustments taking place.

Example, in the northern parts of Canada; especially in the the now Alberta area; dinosaurs roamed the places with new remnants being found in various parts of the province.

Currently, the northern parts in on a gradual rise in temperatures; with perhaps millions years from now; where the areas would again be warm like in the tropics.