Days of summer
In these During these days of summer, a lot of people go to the coast places(I'm not sure what you mean by "coast places") to spend the hottest days of the year. Spending holidays on the beach is a new form of tourism that has changed the Mediterranean Coast. By adding with more and more concrete specific aspects of huge places have been modified that has modified the aspect of huge places. Unfortunately in Spain we have many examples of this: pollution, rubbish("garbage" is a more common English word in the US and "rubbish" in Britian) or and the destruction of typical landscapes are only a few little consequences of these transformations.
Progress(I'm not sure what you mean by progress here), the free time or and the necessity desire to travel and know learn about new cities and atmospheres are symbols of the humanity in the 21st century. and Fighting against these them is impossible. Although However, we must be conscious that the resources are limited and the damages against the world can be fatal(I think this sentence would flow better if you said "...of our limited resources and the potentially fatal damages against the world").
I think that summer is not isn't the best moment to worry about this, but when I sit down on my chair and look at the stars, I think that we should avoid the destruction of all that the nature has created for us. Have a good summer for everybody.