Pollution from cars
it caused many accidents, pollution.
It is a negative effect. While it might be a neat invention to some, it is going to end up destructive and causing a lot of major issues.
overpopulation
Reduced can be positive or negative. For example, "His allowance was reduced because he did not do his chores. As positive, The tension was reduced when they talked about their problems. Though both mean "lessened," in the first example, it has a negative effect, but in the second example, the effect is positive.
He has caused both. One major negative effect was the "Panic of 1837" the positive effect was that he helped set up the political machine.
A negative effect would be how the farmers in the 1930s in mid west america over used the soil which caused it to dry up and take flight in the wind which is refered to now as the dust bow
It caused it economic gap between the rich and the poor I think.
Two negative effects are the noise and the vibrations; caused by the speed.
Radiation is the form of heat transfer that is caused by the greenhouse effect. Carbon dioxide is an example of a greenhouse gas.
It follows that people, goods, and ideas.
negative effect negative effect
The electric current CAUSED a magnetic field. This discovery led to the invention of electromagnet.