$(6$ pts$)$ A facility has a boiler with a capacity of $2MMBt\frac{u}{h}r$ burning natural gas with $85\%$ efficiency. Analysi of exhaust gases shows stoichiometric combustion. The exhaust gases are measured to be at $300F.$ Calculat the maximum rate of natural gas consumption in scfm$.($see info at the bottom of the page$)$

Bonus $3$ pts: Explain and provide $2$ examples for scope $3$ emissions.

Fuel properties: $HV=1,020Bt\frac{u}{s}cf,-=0\mathrm{.}045lb\frac{m}{s}cf$ stoich $=16$

Properties of water: $c=4\mathrm{.}2k\frac{J}{k}gK=1Bt\frac{u}{l}bF$;$=8\mathrm{.}33l\frac{b}{g}al=62\mathrm{.}4l\frac{b}{f}t=1000k\frac{g}{m^3}$