phrasal verbs
When you start something.
What is to set up?
Poor, third-world countries.
What are developing countries?
When you reduce costs.
What is to bring down?
When you broadcast something positive, to raise awareness of something.
What is to promote?
When you respond to a challenge.
What is to take up?
A renewable source of energy, power run by sun-shine.
What is solar power?
Have a good result, it is worth the invested time.
What is to pay off?
Renewable and can last.
What is sustainable?
What is to take forward?
A crucial development in research or in a study.
What is a breakthrough?