Based on real facts.

It turns out that the current government of Spain hasn´t faced the serious pollution problems yet. Since the early 1990´s there have been a lot of companies who have been taking advantage of a loophole.

When it comes to enforcing the law in terms of pollution nobody seems to know what are the boundaries the companies have to respect. As a result, the Spanish rivers and seas have been damaged (or deteriorating) for a long time without control, to such an extent that the current situation has become untenable.

The greatest threats to the enviroment are toxic emissions, such as some kinds of gas, which are contributing to global warming and some sorts of fuel which are being emitted to the ocean and rivers. There´s mounting evidence that several fish species are on the brink of disappearing on the east and north coast of Spain.

The current government has to fix the situation as soon as possible, because otherwise both the national economy and the enviroment will suffer the consequences. It´s well known that the service sector is the main source of revenue for the country. For instance, nobody would longer visit our stunning and shining coasts anymore, thus leaving a lot of restaurants, clubs, hotels etc on the verge of bankruptcy.

From my point of view, there are a lot of things to improve when it comes to protecting our environment. For instance, the government could leverage its power and create restrictive laws.
It would be possible to raise the tax rate for companies when they don't try to pollute less, by contrast the companies who are polluting less and using the least contaminating methods and raw materials could be compensated.

With that being said, it seems to be obvious that the ways to protect our enviroment are limitless. It turns out that the government has done nothing during these years and now everything has become so unsustainable that either we all change our habits or the government enforces the laws severely.

Really good job! Just a few minor mistakes, great writing!