This is the best summary I could come up with:
Sky News analysis shows Russia has increased its attacks on Ukrainian energy systems in recent months, as experts warn the country remains "vulnerable" without stronger air defences to protect its critical infrastructure and the frontline.
Analysis of data from Ukraine's grid operator Ukrenergo shows that throughout March 2024, an average of 889,000 Ukrainians were without power on any given day - the highest number since the war began in February 2022.
Ann Marie Dailey, a policy researcher at the RAND Corporation, said: "Earlier in the war, you saw Russia attacking Ukrainian energy infrastructure as a way to perhaps make it more difficult for civilians to get heat and other resources in the wintertime.
Sky News has analysed 13 videos taken in and around the town, which show that urban areas controlled by Ukrainian forces have been heavily targeted by artillery and air strikes.
Other experts such as Phil Wasielewski, a senior fellow at the Foreign Policy Research Institute, say that the battle for Chasiv Yar is a "deeper part of Russia's strategy" to "grind away at the Ukrainian army so it can fight no more".
While Ukraine awaits the delivery of the latest US aid package, Kyiv's supply of artillery shells and air defence remains critically low.
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