Variables	CO₂
Climate Index	$y = - 2.1399 x^{2} + 3.8637 x - 0.7867$ R² = 0.9099
Precipitation	$y = 0.8162 x^{2} - 0.152 x + 0.2468$ R² = 0.9505
Temperature	$y = - 1.237 x^{2} + 3.4278 x - 1.3058$ R² = 0.9237
Wind speed	$y = 3.6562 x^{2} - 2.9205 x - 0.0335$ R² = 0.9169