Please help to correct these SENTENCES if they have GRAMMAR mistakes [4] 1. While some profound measures have been taken to protect the environment, it is undeniable that it remains in a serious state. A large number of environmental problems, such as global climate change, excessive pollution, deforestation and soil erosion, have heavily influenced our lives. 2. Due to the fact that the unemployment rate is increasing, many undergraduates are under the pressure of the studies. They are generally worried about how to find an ideal job, and therefore, they find it difficult to concentrate on their curriculum. 3. Many universities have launched the free education program, which makes it possible for the students from less well-off backgrounds to have equal access to tertiary education. 4. Genetic engineering could be applied in the cultivation of crop varieties, thereby improving the land productivity. 5. Those young people who do not receive tertiary education are less likely to find the high-technology jobs but normally end up working in low-skilled jobs, as they are lack of professional knowledge and skills.