The main disadvantage of an emissions tax is that :.a) the total pollution reduction from an emissions tax cannot be known for sure. b) firms lack the flexibility to pursue different technologies. c) firms do not have an incentive to reduce pollution. d) firms cannot behave in an economically-efficient manner. e) differences among firms are not incorporated into the policy.

.a) the total pollution reduction from an emissions tax cannot be known for sure.

Explanation:

The broad form of taxes by government on greenhouse gases , these is

✓an emissions tax: this tax is been put on the company due to the quantity that is been produced by entity. This emmision tax is imposed as a result of green house effect gas that is been produced during operation of companies example of this carbon tax, since the effect of the green house is felt in weather events, this tax is on goods or services which is known to be greenhouse gas-intensive, for instance carbon tax on gasoline. It should be noted that the main disadvantage of an emissions tax is that the total pollution reduction from an emissions tax cannot be known for sure.

of the three mortgage options that demarco and tanya have to choose from, the balloon payment mortgage would be their best option, over adjustable payment and fixed payment plans.ultimately, the balloon payment plan would save demarco and tanya overall, in interest, would cost less monthly, and they would only have to make these payments for 8 years, opposing to 30 years for adjustable or fixed payment plans. 

overall, demarco and tanya would save $80,811 if they chose balloon payments over fixed payments, and would save $116,711 if they choose balloon payments over adjustable payments. benefits with choosing fixed payments over adjustable payments is that, in the end, the payments will still be $836.30 a month, while with adjustable payments, the initial monthly payments will be $763.38 to $1082.70 a month, ultimately leading to a more costly purchase. benefits with choosing fixed payments over balloon payments are not present. benefits in choosing adjustable payments over is that it has a lower interest rate, and starts with lower monthly payments initially. benefits in choosing adjustable payments over balloon payments include a lower interest rate, and lower initial monthly payments. benefits in choosing balloon payments over fixed payments include lower interest rates, lower overall price, lower monthly payments, takes less time to pay off, and does not require a downpayment. benefits in choosing balloon payments over adjustable payments include, lower monthly payments (when averaged), takes less time to pay off, and lower overall price.

hence, option c, balloon payments, is the best option for demarco and tanya to make this purchase, for it will save them a minimum of $80811, and a maximum of $116,711.