Projet d'éco-quartier : urbanisme et second conditional

You are an urban planner for a town of $150,000$ inhabitants. The council aims to reduce the carbon footprint by $30\%$ over the next decade. You must transform an industrial zone of $5.5 \times 10^5 \text{ m}^2$ into a sustainable eco-neighbourhood.

1. Write a structured paragraph (approx. $150$ words) outlining three strategies for a sustainable neighbourhood (e.g., green spaces, public transport, energy efficiency).
2. Calculate the population density of this project if you plan to house $12,000$ residents in this zone. Use the formula $\rho = \frac{N}{A}$, where $N$ is the number of residents and $A$ is the area in $\text{km}^2$.
3. Justify your choices using the second conditional structure ($\text{If} + \text{past simple}, \text{would} + \text{verb}$) regarding urban mobility.