You have received a letter from your english speaking pen friend kim who writes : so you see that i enjoy films based or true historic.what kinds of films do you like watching? do you prefer watching films in the cinema or at the home? why? do you by the wayi’ve joined our school theatre club

1. active voice, present simple - main. passive, present simple - the questions asked by the macroeconomist 2. active voice, present simple - what determines the capital spending, active, past simple - all firms combined as opposed to the decision to build a new factory by a single firm 3. active voice, present simple - both 4. active voice, present simple - macroeconomic analyzes attempts to explain , passive, present simple - the magnitudes of the principal macroeconomic variables are determined.  

1. "carbon calculators" can help you to know how much co2 is produced by you. 2. almost one ton of co2 per person may be produced during a flight across the pacific ocean. 3. that can be done by buying energy-efficient light bulbs, refrigerators, and other appliances. by installing solar panels, we can make homes and businesses greener. 4. it may be offsetted by walking, riding bicycles, and driving hybrid cars. 5. this article implies the need  of reducing co2 levels in the atmosphere.because, otherwise it may lead to global warming.