So as you know about global warming probly not many people don't know what is la ninia effect in simple language it is when the weather get in extreme cold or hot ,so as you know the earth is divided into two parts just likethat ,  in the other half is extremely cold and the  other hemisphere extremely hot and vice versa, why is it happening because of global warming , and it's happening right now , for ur sharp action can change the world, even with small action like turning off the tap or turning off lights when not in use , can make a big difference/ impact.