a. My mother has bought me a new surfboard. I'd like to ride ocean waves. (so that + can)

→ My mother has bought me a new surfboard . ride ocean waves.

b. The government has built a new water treatment plant. They want to improve water quality.

(in order to + V)

→ The government has built a new water treatment plant . water quality.

c. The local government has banned plastic bags and straws. This measure aims to protect sea turtles and their habitat. (to + V)

→ The local government has banned plastic bags and straws . sea turtles and their habitat.