New zealand must desalinate seawater to have freshwater like australia.

The statement is not true. In fact, the truth is the other way around. New Zaeland is a country that has an abundance of freshwater reserves, and considering that its population is relatively small, it has it very well in the water supply department. Australia, on the other hand, is a country very poor with freshwater sources, especially when its size its taken into consideration. Luckily for Australia it doesn't have very large population, so the problem is still not as big, though the country is gradually engaging into desalination of seawater, as in some areas there are too many people concentrated, and the water sources can not respond to the demand. New Zealand doesn't have this problem though, as the country has lot of streams, rivers, and lakes, most of which have high quality freshwater that can be used for drinking and everything else. The country needs to be careful though as the pollution is increasing, and even though it doesn't have a problem at the moment, if the current trend continues it might end up in a bad situation in several decades.

im pretty sure its none of them

all 4 come together due to gravity

all objects have gravity, even atoms

but their gravitational force is very low and it takes a long time for them to become closer together

i would expect light rain in pittsburgh throughout the following 24 to 48 hours. the lower/falling weights in urban areas toward the west demonstrate that a low weight framework is moving from west to east toward pittsburgh. low weight frameworks are ordinarily connected with precipitation. the way that you don't see a major drop in temperature in the more western urban areas demonstrates the low weight framework is moving with a warm front, so just light rain would be normal. substantial downpours or progressively vicious climate is just typically connected with chilly fronts, where the warm air is pushed up and over a cool front quickly. this quickly rising air (convection) is what gives you heavier torrential downpours, and other conceivably serious weather conditions.