CO2; net; zero; emission; 2050; year; achieve; carbon dioxide; reduce; discharge; smoke; amount; quality; pollution; control; clean; air; timeline; future; goal; success; climate; action; plan; agreement; time; deadline; down; arrow; reach; level bar; save; environment; sustainability; vector; illustration; concept; outline; flat; graphic; design; icon; sign; symbol; abstract; typographic; background; isolated; element; word –