"Madhara ya ""punguzo la chembe ndogo za hewa,"" ""kuharibika kwa mwangaza,"" ""chafu ya ozoni,"" ""mvua ya asidi,"" ""mvua ya nitrati"" na ""mabadiliko ya hali ya hewa"" ni muhimu."
Masuala tunayohitaji kushughulikia yanahusiana na hali ya hewa.