What options are available in the public policy domain of sustainability?

In the public policy domain of sustainability, federal, state, or city agencies can either 1.
sustainability through proactive zoning laws or 2. it through, for example, strict emission controls.

1. support
1. ignore
1.discourage
2.sponsor
2.disregard
2.enforce

1. support

2. enforce

Explanation:

Public policy domain of sustainability is a framework that deals with sustainability issues. There are three major domains of sustainability including the economy, the environment, and the social. These all the domains are connected with each other and support the sustainability issues.

Government or other federal agencies play important role in order to support the sustainability policy and to achieve the goal of sustainaibility through proactive zoning laws. for example: city agencies can improvise wastewater management, developing water quality policy frameworks and checking the pollutants in the environment.

The Government or state, or city agencies can also enforce, some of the policy for sustainability goal. For example: strict laws for emission control, in which government make strcit rules for regulating auto emission in order to control air pollution.  

Hence, the correct options are 1. support and 2. enforce.

not only is it colder, it also becomes darker, less salty, and more dense.

the titanic would be the correct answer