O consumo de energia está alto este mês.

O is the masculine singular definite article, meaning the.

In Portuguese, it is very common to use the definite article with general or known nouns, especially when talking about something specific in context. Here, o consumo de energia means the energy consumption.

So the structure is:

• o = the
• consumo = consumption

Together: o consumo = the consumption

Portuguese often uses the structure noun + de + noun where English might use a noun as an adjective.

So:

• consumo de energia = consumption of energy / energy consumption
• conta de luz = light bill / electricity bill
• copo de água = glass of water

The preposition de is very common for showing what something is related to.

Because energia is being used in a general sense after de.

In Portuguese, when a noun follows de and has a broad, non-specific meaning, the article is often omitted:

• consumo de energia
• uso de internet
• produção de açúcar

If you were talking about a specific kind of energy, you might use an article:

• o consumo da energia solar = the consumption/use of solar energy

So in this sentence, energia is just a general category.

This is a very common question. Portuguese has two verbs for to be: ser and estar.

Here, está is used because alto describes a condition or state that is seen as temporary or changeable.

• está alto este mês = it is high this month
  This suggests the level may be different next month.

If you said é alto, it would sound more like a permanent or characteristic quality.

A useful shortcut:

• ser = more permanent, defining
• estar = more temporary, current state

Because alto agrees with consumo, not with energia.

The main noun in the sentence is consumo, which is masculine singular:

• o consumo → masculine singular
• therefore: alto → masculine singular

Even though energia is feminine, it is inside the phrase de energia and does not control the adjective here.

Compare:

• O consumo está alto.
• A conta está alta.

In the second example, conta is feminine, so the adjective becomes alta.

Here, alto means high.

It is being used to talk about a level, amount, or quantity. So está alto means something like:

• is high
• is above normal
• is elevated

Portuguese often uses alto/alta with numbers, prices, levels, and costs:

• O preço está alto. = The price is high.
• A temperatura está alta. = The temperature is high.

Be careful: alto can also mean loud in some contexts, but not here.

The accent in está shows the stressed syllable and is part of the correct spelling.

• está = is
• esta = this (feminine)

So the accent is important because it distinguishes two different words:

• está alto = is high
• esta casa = this house

This is a very useful pair to remember.

Yes, in Brazilian Portuguese, este mês and esse mês can both be heard, and in everyday speech esse mês is very common.

Traditional grammar makes a distinction:

• este = this, نزدیک to the speaker / the current one
• esse = that, closer to the listener or something already mentioned

But in real Brazilian usage, that distinction is often weaker than in formal grammar.

So:

• este mês = this month
• esse mês = this month

Both are possible in many contexts, though este mês is perfectly natural and slightly more textbook-like or precise.

Yes. Portuguese allows some flexibility in word order.

The original sentence:

• O consumo de energia está alto este mês.

A very natural alternative is:

• Este mês, o consumo de energia está alto.

Both mean the same thing. The difference is emphasis:

• putting este mês at the end sounds neutral
• putting este mês at the beginning emphasizes the time frame

It is just the normal way to say it here.

Consumo is an abstract noun, like consumption in English. Even though it refers to the amount of energy used over time, Portuguese normally keeps it singular in this kind of statement:

• O consumo de energia está alto.
• O consumo de água caiu.

You would only use the plural consumos in more specialized contexts, such as comparing several separate types or instances of consumption.

Yes. That is also natural.

Gasto means spending, expense, or usage, depending on context. In many situations:

• consumo de energia
• gasto de energia

can both work.

A small nuance:

• consumo focuses more on the amount used
• gasto can suggest expenditure or waste more strongly, depending on context

So consumo is a very neutral choice here.

In many everyday Brazilian contexts, yes, energia often refers to electric power / electricity, especially when talking about household use, bills, or monthly usage.

So this sentence will usually be understood as talking about electricity consumption, not energy in a scientific or abstract sense.

If needed, a speaker could be more explicit and say:

• consumo de energia elétrica

But in normal conversation, energia is often enough.

In careful pronunciation, it is roughly:

o con-SU-mo dji e-ner-JI-a es-TA AL-tu ES-tchi MES

A few useful pronunciation notes for Brazilian Portuguese:

• de often sounds like dji before a vowel in many accents
• este often sounds close to es-tchi
• mês has an open nasal sound and strong stress
• está is stressed on the last syllable: -tá

Pronunciation varies by region, but those patterns are very common in Brazil.