Prepare a mini$-$report on environmental sustainability issues faced by USA having the following mandatory components:

a$)$ An investigative analysis of the carbon tax component in different countries and compare USA and Singapore and explain how USA addresses to keep the Greenhouse gases in control.

b$)$ Conduct a Lifecycle Assessment Process for non$-$biodegradable products of EcoRoots in the US using the Ecological Loop.

c$)$ How does Systems Thinking strengthen Sustainability Research for addressing Greenhouse emissions? Critically discuss the approaches towards mitigating Greenhouse emissions using the Systems Thinking approach