Question 18 (1 point) question 18 unsaved why has the canadian government placed restrictions on mining in the canadian shield? question 18 options: the canadian shield does not produce enough minerals to make jewelry. the government believes mining should only take place in the rocky mountains. mining has harmed the environment through extraction of minerals and timber. the government wants to encourage growing crops instead of mining in the canadian shield. question 19 (1 point) question 19 unsaved cause effect solution companies need wood to make paper. clear-cutting of forests ? which of the following statements would vest replace the "? " in the chart? question 19 options: planting seeds and seedlings to replace forests. spending billions of dollars selling the forests to companies. encouraging clear-cutting to keep lumber costs down for construction workers. providing new homes in the us for wildlife and new areas for human recreation. question 20 (1 point) question 20 unsaved cause effect solution companies need wood to make paper. clear-cutting of forests ? which of the following statements would best describe the meaning of "clear-cutting" used in the chart? question 20 options: growing large amounts of trees creating tunnels underneath forests cutting down large amounts of trees removing the leaves and nests from trees