I read Book 1 and saw the movie last night. There was no climate ideology.
However, there were Agenda 21-type barriers around the producing Districts to keep large tracts of land as wilderness. The contestants had to be schooled in basic wilderness survival techniques that Katniss had already learned by defiantly crossing the barrier to feed her mother and sister. The *arena* was a different geographic area each year. In the present Games, the arena was a hilly, forested area, one that favored Katniss, who already had experience hunting and foraging in her home District. Ironically, the Capitol, the oppressive central government, had no problem destroying the land by fire when they needed to manipulate the movements of the heroine.
The Games were collective punishment on the Districts for losing a Civil War. The Districts, except for 1 & 2 (which were urban government enclaves), were slave labor enclaves that existed to provide the central state with essentials. The visuals of District 12, Katniss’ home district, were reminiscent of Grapes of Wrath and the most poverty-stricken areas of Appalachia.
Thanks for the info. :)