This. If we omit it, we might think you are asking about whether one of the words in that sentence is key. Besides, the question would not make sense without it: “What is the keyword in sentence?”. Sentence is a word in itself, it doesn't have a keyword. read more
As plastic is composed of major toxic pollutants, it has the potential to cause great harm to the environment in the form of air, water and land pollution. Put simply, plastic pollution is when plastic has gathered in an area and has begun to negatively impact the natural environment and create problems for plants, wildlife and even human population. read more