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Green bars represent an increase in the respective resource or goal. Red means a decrease. The length of the bars indicate their impact. In other words: the longer the green, the better; and avoid long red ones!

The biofuel policy in the game invests only in second-generation biofuels that use agricultural crop residues that is not for food as feedstock, so it does not compete for crops with food.

When you play a card, its impacts are dependent on all of the cards you have played before. For example, if you raise taxes on crop production, the effects are going to be dependent on how many crops you have. In policy cards, we try to give you an idea of what effect they will have (and we calculate that by running that card on its own) but we cannot predict exactly what indirect effects your card will have because we do not know what you played before. Who said solving out the problems of the world would be easy!

Your available budget is a certain percentage of worldwide GDP (gross domestic product) that is assigned to you to pursue green policies. As global GDP rises (or falls!) over time your budget will adapt accordingly, giving you more money (or less!) in later rounds. But watch out: policies can become more expensive!

Experience points allow you unlock policies. The more you play, or the more you share the game with your friends on Facebook and Twitter, the more points you’ll get, and the more policies you’ll be able to unlock!

We calculate scores based on the impacts you make to the three goals: (1) jobs, (2) food, and (3) the environment. The final score is determined by adding the scores you achieve in each goal, so keep an eye on all of them!

The approval rating indicates how your policy decisions are received by the citizens of the world. We calculate this based on a variable defined by the World Bank. and called the Human Development Index. An approval of less than 50% for two rounds in a row kicks you out of office, and out of the game!

Policies that cost negative money mean that you will earn money as a result of playing them — such as the implementation of taxes. These may help you in later rounds, but may impact your approval rating, so be careful!

Policies have both direct and indirect effects. The direct effects are shown by the bars. The indirects are the side effects of a policy. For example, if you increase available food through agriculture policies, school grades may improve as a result of better education. (School feeding programs have surprisingly high impacts — at first glance — on student performance.) You will, in turn, lead a more productive workforce which, in turn, leads to a faster growing GDP (gross domestic product). These side effects are included in the scoring after each round.

This is because the improved education level increases labor productivity. And thus given the same capital level, the demand for labor decreases.

For the green sources like solar, wind, etc, the expansion of power plants creates jobs in power plants, while on the other hand it would reduce employment in fossil fuels power plants and in fuel extraction. So total employment is the result of both the positive and negative impacts.

Missions allow you to focus on some of the world’s most important issues. And by doing so, you can win experience points.