Although mining and logging are crucial to the canadian economy, they also a. have negative effects on the environment b. have positive effects on the environment c. cause political conflicts with mexico d. cause political conflicts with the united states

A. have negative effects on the environment

Explanation:

Although mining is important for the country's economy, the environmental impacts of mining are diverse, ranging from specific local problems to large biological, geomorphological, water and atmospheric changes. Therefore, to know these caused problems and the minimization of their effects is of great necessity to guarantee the preservation of the natural environments.

Extraction of wood also has a negative impact on nature, with the greatest impact being deforestation.   The first consequence of deforestation is the impairment of biodiversity, because of the decrease or even the extinction of plant and animal species. Tropical forests have enormous biodiversity and are therefore priceless. Many species, which are still unknown to the urban-industrial society, may be the cure for diseases and can be used in food or as raw materials. With deforestation, there is a risk that these species will be destroyed before being discovered and studied. In addition, the desmatamente destroys the home of many wild animals that end up going to the urban centers and could cause some inconvenience to the population.

a

explanation:

c) troops march forward in close formation against newer, more accurate weapons