POLLUTION is often associated with industrialisation. As economies industrialise, the wastes generated by industries pose problems for the environment. Some can be downright hazardous.
What has become clear over the years is that wastes from industries do not just create problems at source. These wastes often transcend borders, causing transboundary pollution. Acid rain is one example. Canada at one time was at the receiving end of the acid forming sulphur dioxide from coal-fired power plants in the United States. Acid rain is now less of an issue, thanks to the deployment of the scrubbing technology.