Fill in the Blanks NATURAL AND HUMAN CHANGESOnline version Complete with the correct words. by Verónica Alfambra Pérez 1 overfishing changes activities erosion natural Human fires living environment ecosystems Our change over time . The causes of these changes are due to natural and human . Natural changes are produced by factors such as : weathering , and deposition . activities are caused directly or indirectly by humans : deforestation , , pollution and forest . It's important to take care of our because we need it for living and there are a lot of things that need it too .