Let's analyze the data provided in the table to understand the relationship between the management of coal resources and a human population.
\begin{tabular}{|l|l|l|}
\hline
\begin{tabular}{c}
Population \\
growth rate
\end{tabular}
& \multicolumn{1}{|c|}{ Conservation tactic } & \begin{tabular}{c}
Years before \\
population runs out of \\
coal
\end{tabular} \\
\hline None & None & 340 \\
\hline Average & None & 150 \\
\hline Average & Build wind power plant & 175 \\
\hline Average & \begin{tabular}{l}
Build wind power plant and \\
teach public energy \\
conservation
\end{tabular} & 250 \\
\hline High & None & 100 \\
\hline
\end{tabular}
1. Interpret the first row:
- With no population growth (None) and no conservation tactics, the coal resources last for 340 years.
2. Examine the effect of average population growth:
- With average population growth and no conservation tactics, coal lasts for 150 years.
- By building a wind power plant, the number of years increases to 175.
- Adding the teaching of public energy conservation along with building a wind power plant extends this to 250 years.
3. Consider the effect of high population growth:
- With high population growth and no conservation tactics, coal only lasts for 100 years.
### Observations:
- No Population Growth (None-One): The coal lasts the longest at 340 years.
- Average Population Growth:
- The base scenario without conservation reduces the availability to 150 years.
- Implementing the wind power plant moderately extends the availability to 175 years.
- Combining the wind power plant and energy conservation education significantly extends availability to 250 years.
- High Population Growth: Without any conservation, the coal lasts the shortest time, only 100 years.
### Conclusion:
Based on the data:
- Conservation tactics, including renewable energy sources (building wind power plants) and public education in energy conservation, have a significant positive impact on extending the availability of coal resources.
- With higher population growth rates, conservation becomes even more critical to extend the lifetime of the coal resources.
The data from the simulation clearly illustrate that:
D. Conservation can extend how long coal resources are available to a population.
Thus, conservation methods undeniably play a crucial role in managing the sustainability of coal resources for human populations.
