Créditos de carbono são certificados emitidos quando ocorre a redução da emissão de gases que agravam o efeito estufa. por convenção, uma tonelada de gás carbônico corresponde a um crédito de carbono. esse crédito pode ser negociado no mercado internacional. países que não conseguem atingir as metas de redução da emissão dos gases estufa tornam-se compradores dos créditos de carbono. já os países que conseguem manter suas emissões abaixo da meta podem vender os créditos em excesso no mercado internacional. qual é sua opinião a respeito dessa venda? você acha que ela é justa? por quê?

English:  Carbon credits are issued certificates when the emission of greenhouse gases decreases that worsen the greenhouse effect. By convention, one ton of carbon dioxide corresponds to one carbon credit. This credit can be traded on the international market. Countries that fail to achieve greenhouse gas emission reduction targets become buyers of carbon credits. But countries that can keep their emissions below target can sell excess credits in the international market. What is your opinion about this sale? Do you think she's fair? Because?

no, i was listening to water by schoolboy q while and i saw this question

explenation:

water isn't wet. wetness is a description of our experience of water; what happens to us when we come into contact with water in such a way that it impinges on our state of being. we, or our possessions, 'get wet'. a less impinging sense experience of water is that it is cold or warm, while visual experience tells us that it is green or blue or muddy or fast-flowing. we learn by experience that a sensation of wetness is associated with water: 'there must be a leak/i must have sat in something.'

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms